If you reside in the same country as the provider, you only need to dial
the City Code and Telephone Number. If you reside in a different
country as the provider, dial your country's number to make an
international call, the Country Code, City Code and Telephone
Number.
A standard notation is 44 (0) 1223-xxxx-xxxx; 44 is the Country
Code needed to dial to the country; (0) is the NDD prefix necessary
to dial within the country. If calling from within the country, the
number would be 0 1223-xxxx-xxxx.
An IDD prefix is needed to call from one country to another
country.
For example, to call another country from Germany, you must dial
00 before the country code. These values vary between countries
and countries can have multiple IDD numbers (based on long-
distance carrier). If calling a country from Germany, the number
would be 00 44 1223-xxxx-xxxx.
